Abstract: To summarize the fetal-neonatal perioperative nursing experience of a case of rare left ventricular aneurysm. In view of the high risk in the fetal period，preoperative cardiac insufficiency and postoperative circulatory instability，close follow-up in the fetal period was adopted，and we improved cardiac function，prevented thrombus shedding and tumor rupture before the operation in the neonatal period. We set target blood pressure according to age characteristics after the operation，regulated body fluid balance through early volume management， did a good job in sedation and analgesia management to reduce myocardial oxygen consumption，promoted cardiopulmonary rehabilitation through phased nursing intervention，and strictly observed and prevented complications. We improved the health education and follow-up measures at the discharge stage. After 32 days of intensive care，the patient was discharged from the hospital in a stable condition. After more than 1 month of follow-up after discharge，the patient’s cardiac function recovered well.

Key words: Heart Aneurysm, Critical Care Nursing, Perioperative Nursing, Pediatric Nursing